Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: STLKIATCDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
712-284 A Alta IA 9631 QWEST CORPORATION 630      
712-284 1 Alta IA 9631 QWEST CORPORATION 630      
712-284 2 Alta IA 9631 QWEST CORPORATION 630      
712-732 A Storm Lake IA 9631 QWEST CORPORATION 630      
712-749 A Storm Lake IA 9631 QWEST CORPORATION 630      
712-749 1 Storm Lake IA 9631 QWEST CORPORATION 630      
712-749 2 Storm Lake IA 9631 QWEST CORPORATION 630      
712-749 3 Storm Lake IA 9631 QWEST CORPORATION 630      
712-749 4 Storm Lake IA 9631 QWEST CORPORATION 630      
712-749 5 Storm Lake IA 9631 QWEST CORPORATION 630      
712-749 6 Storm Lake IA 9631 QWEST CORPORATION 630      
712-749 7 Storm Lake IA 9631 QWEST CORPORATION 630      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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